i am korean m1 user
and someone in my cafe, he made a custom firmware for m1 user
and do you know what's diffrent from normal firmware and custom firmware?
in custom firmware, you can acces into WinCe
do you know wince? it's one of microsoft's OS
in wince, you can run wince program. and there are many many wince program
but unfortunately, there is limit. if you reset m1, everything you made in wince disappear like if you install something, it goes away but file remains
and when you install fiware, you have to put ypmb1_apps.zip with rom file
without unpacked file just zip file abd also put 탐색기.lnk an itaskmgr.lnk

oh and m1 can't run some files. i don't know why
if my english is akward, sorry

oh and there will be 탐색기.lnk and itaskmgr.exe
after firmware, go to dictoinary icon and run dictionary
7z program will run
and go to computer-nandflash
and run 탐색기.lnk and kill 7z program with click x icon on the top right
and also run itaskmgr And kill p4star.exe and p4app.exe you can run programs.
if you have a question email meymhuh1997@naver.com

I don't have a M1 right now to try it and I won't be able to get one before 15 days so meanwhile could you please show us some pictures (or even a video) of WinCE running on the M1?
And could please also post the link to the original Korean thread about that hack